The Tianyuan Chemical circulating fluidized bed + gas flow bed coupled gasification unit has operated continuously and stably for over 280 days

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The coupled fluidized bed + gas flow bed gasification unit developed by Tianyuan Chemical has been operating continuously and stably for over 280 days. Author/Source: Gasification World. Date: May 19, 2023. Clicks: 26. The clean and energy-efficient upgrade project for coal gasification at Hebei Tianyuan Chemical Group Co., Ltd. (referred to as the “Tianyuan Project”) utilizes a 2*45 kNm3/h fluidized bed + 1*20 kNm3/h gas flow bed coupled gasification unit supplied by Anhui Keda Clean Energy Co., Ltd. (referred to as “Anhui Keda Clean Energy”). This represents the first instance of these two gasification technologies being used together in the chemical industry. The project began operations in May 2021, supplying raw gas for ammonia synthesis; to date, it has been in operation for 24 months straight, with each period of continuous operation exceeding 280 days, and its performance has been excellent. In this project, the fluidized bed uses fly ash from fluidized beds as raw material, which not only solves the problem of handling such fly ash but also **reduces the production cost of the feed gas. While reducing environmental pressures on enterprises, it also brings economic benefits to them. Circulating fluidized bed gasification technology is the company’s flagship product. Since its industrial application, the company has built a total of 103 such gasification units, which are used in industries such as alumina production, ceramics, carbon manufacturing, coking, magnesium production, and hydrogen metallurgy. This technology offers advantages such as energy efficiency, environmental protection, and high performance. This technology passed the evaluation for scientific and technological achievements by the Ministry of Industry and Information Technology in 2015, won the second prize of the Anhui Provincial Science and Technology Award in 2017, was selected as one of China’s \"Top Ten\" best energy-saving technologies in 2019, and was included in the **Recommended List of Industrial Energy-Saving Technologies in 2021. As another key product of this company, the low-pressure fluidized bed gasification technology passed the evaluation for scientific and technological achievements in 2015, won the third prize in the Anhui Province Science and Technology Award in 2021, and passed the evaluation for new products in Anhui Province in 2022. It boasts advantages such as cleanliness (no tar or phenolic substances are produced during the production process; the H2S content in the gas is ≤20 mg/Nm3, and the dust content is <1 mg/Nm3) and high efficiency (the comprehensive utilization rate of coal is ≥98%, and the heat recovery rate is ≥95%). The core unit, the gasification furnace, features a membrane-type water wall structure; by utilizing the principle of \"using slag to counteract slag,\" it provides a reliable guarantee for the safe and stable operation of the system.